ProMariner TruePower Plus 1200MS Modified Sine Wave Inverter – 06120

Product Description

The ProMariner TruePower Plus 1200MS converts power from a nominal 12-volt battery bank into 115-volt modified sine wave AC power for common onboard and mobile appliances. It provides 1,200 watts of continuous output, up to 2,400 watts of surge capacity and an integrated 30-amp automatic transfer switch that passes shore or generator power through to the connected AC circuits when external power is available. ProMariner identifies suitable loads including smartphones, laptops, coffee makers and electric grills.

Key Features

• 1,200 watts of continuous AC output
• Up to 2,400 watts of surge capacity
• Converts 12-volt DC battery power to 115-volt AC power
• Modified sine wave output for compatible appliances
• Internal 30-amp automatic AC transfer switch
• AC transfer time of less than 30 milliseconds
• Dual-colour digital LCD message centre
• Separate gauges for AC output and DC battery input
• USB charging port
• GFCI-protected convenience outlets
• Soft-start, noise-filtered technology
• Included remote on/off panel with LED indicators
• Nine-foot remote cable included
• Conformal-coated internal electronics
• Shock-resistant construction
• Two-year manufacturer warranty

Application Compatibility

The TruePower Plus 1200MS is designed for nominal 12-volt systems in:

• Recreational and commercial boats
• Motorhomes and travel trailers
• Mobile service vehicles
• Commercial trucks
• Remote and off-grid electrical systems
• Industrial and specialty vehicles

Compatible loads may include:

• Coffee makers
• Electric grills
• Laptops
• Mobile-device chargers
• Televisions
• Lighting
• Conventional power tools
• Other equipment approved for modified sine wave power

The total continuous load must remain within the inverter’s 1,200-watt rating, and appliance startup demand must remain within its 2,400-watt surge capacity.

Electrical Specifications

• Manufacturer model: TruePower Plus 1200MS
• Manufacturer part number: 06120
• Nominal DC input: 12 volts
• DC operating range: 11–15 volts
• Continuous AC output: 1,200 watts
• Surge output: 2,400 watts
• AC output voltage: 115 volts
• AC output frequency: 60 Hz
• Output waveform: Modified sine wave
• Optimum efficiency: Greater than 90%
• Automatic AC transfer-switch rating: 30 amps
• AC crossover time: Less than 30 milliseconds
• Inverter-off current draw: 4 mA
• DC connection: Hardwired
• AC convenience outlets: Two duplex GFCI outlets
• USB charging port: Included

Display and Remote Control

The front-mounted display provides operating information through:

• Dual-colour digital messages
• AC output-load indication
• DC battery-input indication
• Low- and high-voltage warnings
• Overload indication
• Over-temperature warnings
• Fault and shutdown notifications

The included remote panel provides inverter on/off control, input-source LED indication and fault-status indication. Remote mounting screws and a nine-foot communication cable are included.

Built-In Protection

The TruePower Plus 1200MS includes protection against:

• AC output overload
• Short circuits
• Excessive operating temperature
• Low DC battery voltage
• High DC battery voltage
• Reverse-polarity connection
• Abnormal operating conditions requiring an audible alarm or shutdown

Reverse-polarity protection does not remove the need to verify cable polarity before connecting the inverter to the battery bank.

Dimensions and Weight

• Height: 4 inches
• Width: 9.9 inches
• Length: 11.5 inches
• Weight: 7.3 lb
• Approximate packaged dimensions: 6 × 11 × 14 inches
• Approximate packaged weight: 9 lb

Fitment Notice

Part number 06120 is the 1,200-watt modified sine wave model in the ProMariner TruePower Plus series. It is designed for a nominal 12-volt battery bank and must not be connected to a 24-volt or 48-volt system.

This product is an inverter with automatic AC pass-through. It does not contain a battery charger.

Modified sine wave power is not suitable for every appliance. Equipment that may require pure sine wave power includes:

• Variable-speed motors
• Induction motors
• Refrigerators and freezers
• Electronically controlled appliances
• Digital timers and clocks
• Medical equipment
• Certain battery chargers
• Sensitive audio and video equipment

Confirm waveform compatibility with the appliance manufacturer before connecting sensitive equipment.

Battery-Bank Requirements

At full output, a 1,200-watt inverter may draw approximately 110 amps or more from a 12-volt battery bank after conversion losses are considered. The installation must include:

• Adequate battery capacity
• Correctly sized marine-grade DC conductors
• Short battery-cable runs
• Properly rated overcurrent protection
• A suitable battery disconnect switch
• Secure and corrosion-free terminals

Available runtime depends on battery chemistry, usable amp-hour capacity, battery condition, appliance load and permitted depth of discharge.

Installation Notes

Install the inverter in a dry, ventilated compartment protected from:

• Direct spray and bilge water
• Battery gases
• Fuel vapours
• Excessive heat
• Physical damage

Use correctly sized marine-grade DC conductors and keep the cable run as short as practical. Install suitable overcurrent protection close to the battery bank and use a properly rated battery disconnect.

The integrated AC cable strain reliefs and front screw-terminal connections allow the AC wiring to be installed without ring terminals. AC input, output, grounding and branch-circuit protection must follow the ProMariner installation manual and applicable marine electrical requirements.

When This Product Needs Replacement

Inspect or replace the inverter if it:

• Repeatedly shuts down under loads it previously operated
• No longer produces stable AC output
• Fails to transfer shore or generator power correctly
• Displays recurring overload or temperature faults
• Has damaged GFCI outlets, terminals or cable connections
• Shows evidence of overheating, moisture intrusion or corrosion
• Produces unusual noise, odor or excessive heat
• Stops communicating with the remote panel

Before replacing the inverter, load-test the battery bank and inspect the DC fuse, disconnect switch, grounding, cable terminals and voltage drop.

Included Components

• TruePower Plus 1200MS inverter
• Remote on/off panel
• Nine-foot remote cable
• Remote mounting hardware
• DC terminal covers
• Integrated AC cable strain reliefs

Alternate Part Numbers

• ProMariner part number: 06120
• Unpadded catalogue reference: 6120
• Model name: TruePower Plus 1200MS
• UPC: 031669061200
• Distributor reference: CW63221
• Alternate MPN: 63221

Parts Desk Insight

The TruePower Plus 1200MS is the smallest modified sine wave model in this ProMariner series. It provides the same display, remote control and 30-amp automatic transfer system as the larger 1,500- and 2,000-watt versions, but in a more compact enclosure for moderate AC loads. For refrigeration, variable-speed equipment or sensitive electronics, choose a pure sine wave inverter instead.